JPH04201862A - Packaging container - Google Patents

Abstract

PURPOSE:To make lids difficult to deform when they are held with the hand or stacked and the display of the containers stacked in a multiple tier easy by forming in the opposite positions of the container at least two projection parts which make contact with the side part of the lid and the inner surface of the top panel thereof when the lid is closed. CONSTITUTION:Upwardly extending projection parts 2 are provided on and slightly inwardly of the flange parts 7 formed on the opposite two sides of a container body 1. When a lid 3 is closed, the outer surface of the projection part 2 makes contact with the inner surface of the side part 6 of the lid 3 and the top surface thereof makes contact with the inner surface of the top panel 5 of the lid 3. Accordingly, the side part 6 and the top panel 5 of the lid 3 are supported by the projection parts 2 when the lid 3 is closed. In the case of the container body 1 formed of synthetic resin sheet, the projection part 2 is formed by pressure or vacuum forming method simultaneously with the formation of the container body 1. In this case, since a downwardly opening recess part 8 is defined by the projection part 2 and a downwardly extending flange 7 of the container body 1, this recess part 8 can be used as a handle by inserting the fingers thereinto.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a packaging container used, for example, as a disposable packaging material for food packaging, and particularly to a packaging container in which at least the lid is made of a sheet material.

[Prior Art 1] Conventionally, packaging containers made of synthetic resin sheet moldings have been known as disposable packaging containers used for food packaging and the like.

FIG. 5 shows an example of a packaging container for the synthetic resin sheet molded product, in which a low protrusion 2 is formed around the upper edge of the main body l, and a step is formed around the lower edge of the lid 3. A portion 4 is provided, and when the lid body 3 is closed, the protruding portion 2 and the step portion 4 are fitted together.

The above figure 5 shows an example in which both the main body 1 and the lid 3 are made of synthetic resin sheets, but in addition, the main body 1 can be made of synthetic resin foam board or injection molded, and only the lid 3 is made of synthetic resin sheets. There are also many synthetic resin sheet molded products designed to reduce costs.

[Problems to be Solved by the Invention] However, when the lid 3 is made of a sheet material such as a synthetic resin sheet molded product, as shown in FIG. is located above the upper edge of the main body l, when the packaging container is held in the hand,
If you hold it too tightly, you may end up crushing the sides 6 and top 5 of the lid 3, which may easily fall off or damage the contents. Also, when these packaging containers are stacked,
After all, the lid body 3 easily deforms and collapses (there is also the problem that it is difficult to display).

The above problem is more likely to occur as the depth of the lid 3 (the distance from the upper edge of the main body 1 to the top 5 of the lid 3) increases, and in such a case, many reinforcing lips are formed on the lid 3. Otherwise, the lid body 3 must be made of a thick material, causing design limitations and increased costs.

[Means for solving the problem j The means taken in the present invention to solve the above problem,
To explain with reference to FIGS. 1 and 2, which correspond to one embodiment, the present invention consists of a main body 1 and a lid 3 made of sheet material, and when the lid 3 is closed, the lid 3 When the top 5 of the packaging container is located above the upper edge of the main body 1, there are at least two stripes that touch the sides 6 of the lid 3 and the inner surface of the top 5 when the lid 3 is closed. A measure is taken in which the protrusions 2 are formed at opposing positions on the main body 1.

[Function] The protruding portion 2 in the present invention is in contact with the side portion 6 and the top portion 5 of the lid body 3, and thereby functions to support the side portion 6 and the top portion 5 of the lid body 3, which are easily crushed. be. Further, the protrusion 2 is
When the lid 3 is placed on the main body 1, it also serves to integrate the two.

[Example] An embodiment of the present invention will be explained with reference to FIGS. 1 and 2. FIG.

As shown in the figure, the present packaging container is composed of a main body 1 and a lid 3, each of which has a substantially rectangular plan view. Also,
The lid 3 has side portions 6, and when the lid 3 is closed, the top 5 of the lid 3 is located above the upper edge of the main body l.

This packaging container is one in which the lid 3 is made of a sheet material. Examples of the sheet material include a synthetic resin sheet, paper, a synthetic resin film, or a laminate of metal foil and paper. However, in order to obtain the display effect of the contents, it is preferable to use a transparent synthetic resin sheet molded product.

The main body 1 may be made of the same sheet material as the lid 3, or may be made of other materials. When the main body 1 is made of a material other than a sheet material, the main body 1 can be made of, for example, a synthetic resin foam or an injection molded product.

A flange portion 7 projecting outward is formed on the upper edge of the main body 1, and a stepped portion 4 that fits into the flange portion 7 is formed on the lower edge of the lid body 3. This flange part 7
The fitting between the step part 4 and the step part 4 is to ensure that the lid body 3 does not slip off from the main body 1 (that is, it can be tightly closed). 3 can be prevented from shifting, it is possible to omit fitting the flange portion 7 and the stepped portion 4. In this case, the protrusion 2 prevents the lid 3 from shifting in a relatively loose state. , it is possible to eliminate the difficulty of opening and closing due to catching that is peculiar to fitting.

In addition, the inner side portions of the flange portions 7 located on two opposing sides of the main body l are bulged upward to form protruding portions 2.

The protrusions 2 in this embodiment are arranged oppositely as described above.
Although the main body 1' is provided with stripes, independent protrusions 2 may be provided on each of the three sides of the main body 1', or further, independent protrusions 2 may be provided on each of the four sides of the main body 1. However, when the lid 3 is made of a transparent material and the main body 1 is made of an opaque material, in order to maintain the visibility of the contents through the lid 3, it is necessary to Protrusions 2 are provided only on the sides,
It is preferable to obtain as wide a field of view as possible.

When the lid 3 is closed, the protruding portion 2 has its outer surface in contact with the inner surface of the side portion 6 of the lid 3, and its upper surface in contact with the inner surface of the top portion 5 of the lid 3.

Therefore, when the lid 3 is closed, the side portion 6 and top portion 5 of the lid 3 are supported by the protruding portion 2.

When the main body 1 is a synthetic resin sheet molded product, the protrusion 2 is formed simultaneously with the molding of the main body l by pressure forming or vacuum forming. This becomes a recess 8. If the recess 8 opens downward in the flange 7 of the main body 1, as shown in the figure, by inserting a fingertip into the recess 8 when holding the packaging container, it can be used as a flat part. Can be used.

The external shape of the protrusion 2 in this embodiment is a horizontally elongated rectangle, and its upper surface is in contact with the inner surface of the top 5 of the lid body 3 over almost the entire length. As shown in FIGS. 3(a) to 3(c), the outer shape of
It can also be semicircular, trapezoidal, or even have a wavy upper part.

Further, with reference to FIG. 4, another example of the planar shape and formation position of the protrusion 2 will be described.

4(a) and (b') each show the case where the planar shape of the main body 1 is approximately fan-shaped, and the protrusion 2 in FIG.
are formed along opposing arcuate sides, and the protrusion 2 in (b) is formed along opposing straight sides.

FIG. 4(c) shows a case where the planar shape of the main body 1 is a quadrangle, similar to that explained in FIG. It is U-shaped.

4(d) and (e) each show the case where the planar shape of the main body l is circular, and the protrusion 2 in FIG. 4(d) is formed in a straight line slightly inside the main body l. in this case,
The protrusion 2 can be formed by bulging the bottom of the main body 1 upward.

The protrusion 2 in (e) is formed in an arc shape along the outline of the main body 1.

[Effects of the Invention] The present invention is as described above, and has the following effects.

(1) Since the side portion 6 and top portion 5 of the lid 3 are supported by the protruding portion 2, the lid 3 is unlikely to be crushed when held in the hand or stacked. Therefore, it is possible to prevent the lid body 3 from being dropped or damaging the contents due to the collapse of the lid body 3, making it easier to hold the lid body 3, and also making it easier to display the lid body 3 by stacking it in multiple tiers.

(2) Even if the depth of the lid 3 is increased, the lid 3 can be prevented from collapsing by using a thin material without providing reinforcing ribs, so packaging containers of various designs can be provided at low cost.

(3) Since the depth of the lid 2 can be increased, the entire packaging container can be thickened and its substantial volume can be increased.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the packaging container according to the present invention, Fig. 2 is a longitudinal sectional view of the packaging container with its lid closed, and Fig. 3 (
4(a) to 4(c) are diagrams each showing other examples of the outer surface side shape of the protrusion, FIGS. FIG. 5 is a longitudinal cross-sectional view showing the prior art. l2 main body, 2: protrusion, 3: lid, 4: step, 5: top, 6: side, 7: flange, 8. recess.

Claims (1)

[Claims] 1) Consists of a main body and a lid made of sheet material,
In a packaging container in which the top of the lid is located above the upper edge of the main body when the lid is closed, at least two stripes are provided that touch the sides of the lid and the inner surface of the top when the lid is closed. A packaging container characterized in that the protruding parts are formed at opposing positions of the main body.